打开SIMATIC Manager提示：Connot establish connection to the Automation License Manager Service.<0x0000274D> 点击确定后提示：NO valid license key found. please install a valid license key.
再点击确定后提示：STEP 7 has found a problem with the Automation License Manager. The application is closing. Please reinstall the Automation License Manager.
打开“Automation License Manager“提示：The "Automation License Manager Service" has not been started!
Please start the Service.
我以前已经装好用一段时间的了，今天就没法打开了，不知道是为什么？有哪位知道的麻烦指点一下！多谢了！